High-temperature-resistant coating and preparation method thereof

Abstract

The invention relates to a high-temperature-resistant coating and a preparation method thereof. The high-temperature-resistant coating is prepared from two components, namely a component A and a component B, wherein the component A comprises organic silicon resin, cadmium red, a dispersing agent, an auxiliary agent and a solvent, and the above raw materials are mixed and dispersed to obtain the component A, and the mass content of inorganic components in the organic silicon resin is not lower than 60%; the component B is alcohol-soluble silica sol; and the component A and the component B are mixed to form the high-temperature-resistant coating. The high-temperature-resistant paint disclosed by the invention is low in substrate pretreatment requirement and outstanding in high-temperature resistance, solves the problem of discoloration of the cadmium red pigment at a high temperature to a great extent, and has wide application prospects.

Description

technical field [0001] The invention relates to the field of new materials, in particular to a high-temperature resistant coating and a preparation method thereof. Background technique [0002] High temperature resistant coatings refer to functional coatings that can still maintain certain physical and chemical properties under long-term high temperature (≥1000h) conditions, so that the protected objects can operate normally. The research on high-temperature resistant coatings has a long history, and the film-forming resins and pigments of coatings also change according to the specific use temperature. When the temperature exceeds 1000°C, thermal spraying of metal / non-metal oxides is generally used; when the temperature is lower than 1000°C, organically modified silicone or pure silicone resin is the most common film-forming material. [0003] An unavoidable shortcoming of silicone high-temperature resistant coatings is that under high temperature conditions, with the decom...

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Problems solved by technology

Cadmium red is the red inorganic pigment with the highest temperature resistance. However, among silicone resins, cadmium red tends to lose color at high temperature. The existing research has not clarified the color loss mechanism of cadmium red at high temperature.

In addition, the problem of post-processing is often involved after spraying high-temperature resistant coating on stainless steel

A large increase in the content of inorganic substances in the silicone resin will cause the coating to become brittle, and it is easy to crack and peel during post-processing on the surface of the stainless steel plate that has not been sandblasted. This is also a problem that needs to be paid attention to in the research

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